.bottom-btn-back {
	background: url('https://img13.360buyimg.com/imagetools/jfs/t1/147023/19/12300/2105/5f98e27eEc691a2f2/3de20239e0bd2e46.png')
		no-repeat;
	background-size: 100% 100%;
	width: 750px;
	height: 275px;
	position: fixed;
	bottom: 0;
	left: 0;
	z-index: 9999;
	.btn-word {
		text-align: center;
	}
	.bottom-btn {
		width: 522px;
		height: 218px;
		position: absolute;
		bottom: 0;
		left: 50%;
		margin-left: -261px;
	}
	.btn-area {
		width: 150px;
		height: 150px;
		border-radius: 50%;
		position: absolute;
		top: 20px;
		left: 50%;
		margin-left: -75px;
	}
}
